diff --git a/src/vpp-api/vapi/vapi_c_gen.py b/src/vpp-api/vapi/vapi_c_gen.py
index 9a285eb98ad..330bd92ef8f 100755
--- a/src/vpp-api/vapi/vapi_c_gen.py
+++ b/src/vpp-api/vapi/vapi_c_gen.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python2
+#!/usr/bin/env python3
 
 import argparse
 import os
diff --git a/src/vpp-api/vapi/vapi_cpp_gen.py b/src/vpp-api/vapi/vapi_cpp_gen.py
index c08993dc918..c6aa009cbb9 100755
--- a/src/vpp-api/vapi/vapi_cpp_gen.py
+++ b/src/vpp-api/vapi/vapi_cpp_gen.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python2
+#!/usr/bin/env python3
 
 import argparse
 import os
diff --git a/src/vpp-api/vapi/vapi_json_parser.py b/src/vpp-api/vapi/vapi_json_parser.py
index 98143e26756..2a03bd04c03 100644
--- a/src/vpp-api/vapi/vapi_json_parser.py
+++ b/src/vpp-api/vapi/vapi_json_parser.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python2
+#!/usr/bin/env python3
 
 import json
 
@@ -395,7 +395,7 @@ class JsonParser(object):
                     self.types[type_.name] = type_
                     self.types_by_json[path].append(type_)
                     self.logger.debug("Parsed type: %s" % type_)
-                for name, body in j['aliases'].iteritems():
+                for name, body in j['aliases'].items():
                     if name in self.aliases:
                         progress = progress + 1
                         continue